JPH08277482A - Washing device for machined article - Google Patents

Abstract

PURPOSE: To constitute a washing device for machined articles in such a manner that the oil-components of the intricate parts of the inside, such as threaded holes, of the wash in addition to the oil-components sticking to the outside surfaces of the wash are sufficiently removed. CONSTITUTION: This washing device has a first washing section 1 which washes the wash and a second washing section 2 which further washes the wash washed by this first washing section 1 and is so constituted that the wash is washed by injecting washing fluid from an injection means 8 to the wash in the first washing section 1. The washing by cavitation bubbles is executed by reducing the pressure and boiling the liquid in the state of immersing the wash into the liquid in the second washing section 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning device for removing oil such as cutting oil or quenching oil adhering to a machined object (object to be cleaned) after machining or after quenching.

[0002]

2. Description of the Related Art As a cleaning device for a machine work as described above, a device for injecting a cleaning liquid from an injection nozzle into an object to be cleaned from the outside in the air, or an object to be cleaned is immersed in the liquid. In this state, there is a configuration in which the cleaning gas is sprayed from the outside to the object to be cleaned from the spray nozzle in the liquid.

[0003]

In the object to be cleaned, which is a machined object, there are many portions that have entered the object to be cleaned such as screw holes and oil passages for hydraulic circuits. As a result, the oil or the like in the portion that has entered the inside may not be sufficiently removed only by injecting the cleaning liquid or the cleaning gas from the outside of the object to be cleaned. Low-viscosity oil such as cutting oil for machining can be removed relatively easily by spraying the cleaning liquid or cleaning gas onto the object to be cleaned, as described above, whereas it can be removed by quenching. High-viscosity oil such as the quenching oil may not be sufficiently removed by only spraying the cleaning liquid or the cleaning gas onto the object to be cleaned as described above. INDUSTRIAL APPLICABILITY The present invention is configured so that, in a cleaning device for machined workpieces, oil and the like in the portion that has entered the inside of the object to be cleaned can be sufficiently removed, and even high-viscosity oil can be sufficiently removed. Is intended.

[0004]

The feature of the present invention resides in that the above-described cleaning device for machined workpieces is constructed as follows. [1] A jet that includes a first cleaning unit that cleans an object to be cleaned and a second cleaning unit that further cleans the object to be cleaned washed by the first cleaning unit, and ejects a cleaning fluid onto the object to be cleaned. Means first
The second cleaning unit is equipped with a predetermined amount of liquid for immersing the object to be cleaned in the cleaning unit, and decompression means for reducing the pressure in the space above the liquid to a predetermined low pressure or less to boil the liquid. is there.

[2] A first cleaning section for cleaning an object to be cleaned,
Second cleaning for further cleaning the cleaning target cleaned in the first cleaning section
A cleaning unit, a predetermined amount of liquid for immersing the object to be cleaned, and an injection unit for injecting a cleaning fluid into the object to be cleaned in the liquid are provided in the first cleaning unit to immerse the object to be cleaned. The second cleaning unit is provided with a fixed amount of liquid and a pressure reducing means for reducing the pressure in the space above the liquid to a predetermined low pressure or less to boil the liquid.

[3] A first cleaning section for cleaning an object to be cleaned,
Second cleaning for further cleaning the cleaning target cleaned in the first cleaning section
A cleaning unit is provided, and a predetermined amount of liquid capable of immersing the object to be cleaned, and a raising and lowering operation over a first position above the liquid in the first cleaning unit and a second position for immersing the object in the liquid A free elevating means, a first ejecting means for ejecting a cleaning fluid onto the object to be cleaned at the first position, and a second ejecting means for ejecting the cleaning fluid onto the object to be cleaned at the second position. Provided in the first cleaning unit, a predetermined amount of liquid for immersing the object to be cleaned, and decompression means for reducing the pressure in the space above the liquid to a predetermined low pressure or less to boil the liquid are provided in the second cleaning unit. It is prepared.

[4] In the constitution of any one of [1] or [2] or [3] above, there is provided an injection means for injecting a gas having a pressure higher than a predetermined low pressure into the liquid of the second cleaning section. There is.

[0008]

[Action]

[I] With the configuration as described in [1] above, for example, as shown in FIG. 1, the object to be cleaned is first put into the first cleaning unit 1, and the jetting means 8 of the first cleaning unit 1 directs the object to be cleaned. The cleaning fluid (liquid, steam, high-pressure compressed air, etc.) is sprayed. As a result, the oil and the like adhering to the outer surface of the object to be cleaned is removed and drops downward. In this case, the oil content of the portion that has entered the inside of the object to be cleaned such as the screw hole and the oil passage for the hydraulic circuit may not be sufficiently removed yet.

When the cleaning in the first cleaning unit 1 is completed as described above, the object W to be cleaned is then put into the second cleaning unit 2. In the second cleaning unit 2, for example, as shown in FIG. 11B, the space above the liquid M2 in the second cleaning unit 2 is depressurized while the object W to be cleaned is immersed in the liquid M2.
As a result, the liquid M2 starts to boil to generate minute cavitation bubbles, and the minute cavitation bubbles grow. In this case, when the pressure in the space above the liquid M2 in the second cleaning unit 2 reaches the saturated vapor pressure at the temperature of the liquid M2 at that time, cavitation bubbles are further generated.

The generation and growth of these minute cavitation bubbles are caused by the object to be cleaned such as the outer surface of the object to be cleaned W, the portion entering the inside of the object to be cleaned W such as screw holes and oil passages for hydraulic circuits. It occurs continuously on every surface of W. Therefore, due to the generation and growth of the minute cavitation bubbles and the rise to the liquid surface, the oil and the like adhering to the portion that has entered the inside of the object W to be cleaned is removed. And the first
In the cleaning unit 1, the oil or the like attached to the outer surface of the object to be cleaned W is removed to some extent in advance, and the removed oil or the like does not enter the liquid M2 of the second cleaning unit 2.
In the cleaning unit 2, the cavitation bubbles can reliably remove the oil and the like in the portion that has entered the object to be cleaned W without being disturbed by the oil and the like.

[II] With the construction as described in [2] above, for example, as shown in FIG. 1, the object to be cleaned is first put in the first cleaning section 1 and then immersed in the liquid M1 for the first cleaning. Part 1
The cleaning fluid (liquid, steam, high-pressure compressed air, etc.) is sprayed from the spraying means 9, 10 onto the object to be cleaned. As a result, the oil content and the like adhering to the outer surface of the object to be cleaned is removed and floats on the liquid surface of the liquid M1. In this case, the oil content of the portion that has entered the inside of the object to be cleaned such as the screw hole and the oil passage for the hydraulic circuit may not be sufficiently removed yet.

When the cleaning in the first cleaning section 1 is completed as described above, the object W to be cleaned is then put into the second cleaning section 2 as in the case of the construction of the above-mentioned [1]. In the second cleaning unit 2, for example, as shown in FIG. 11B, the cleaning target object W is the liquid M2.
The pressure in the space above the liquid M2 in the second cleaning unit 2 is reduced in the state of being immersed in. As a result, the liquid M2 starts to boil to generate minute cavitation bubbles, and the minute cavitation bubbles grow. In this case, when the pressure in the space above the liquid M2 in the second cleaning unit 2 reaches the saturated vapor pressure of the temperature of the liquid M2 at that time,
Cavitation bubbles are generated even better.

The generation and growth of these minute cavitation bubbles are caused by the object to be cleaned such as the outer surface of the object to be cleaned W, the portion entering the inside of the object to be cleaned W such as a screw hole or an oil passage for a hydraulic circuit. It occurs continuously on every surface of W. Therefore, due to the generation and growth of the minute cavitation bubbles and the rise to the liquid surface, the oil and the like adhering to the portion that has entered the inside of the object W to be cleaned is removed. And the first
In the cleaning unit 1, the oil or the like attached to the outer surface of the object to be cleaned W is removed to some extent in advance, and the removed oil or the like does not enter the liquid M2 of the second cleaning unit 2.
In the cleaning unit 2, the cavitation bubbles can reliably remove the oil and the like in the portion that has entered the object to be cleaned W without being disturbed by the oil and the like.

[III] With the construction as described in [3] above, for example, as shown in FIG.
Can be put in. In this case, in the first cleaning unit 1, a space is formed in the upper part, the liquid M1 is provided in the lower part, and the elevating means 29 for elevating and lowering the object to be cleaned is provided. Therefore, if you decide that you should wash in air,
By the elevating means 29, the object to be cleaned is placed above the liquid M1 by the first
Set to position. As a result, as in the case of the configuration described in [1] above, the cleaning fluid (liquid, vapor, high-pressure compressed air, etc.) is sprayed from the first spraying means 8 of the first cleaning unit 1 to the object to be cleaned. The oil and the like adhering to the outer surface of the object to be cleaned is removed and drops downward.

On the contrary, when it is judged that the cleaning should be performed while the liquid M1 is immersed, the elevating means 29 is set to the second position where the object to be cleaned is immersed in the liquid M1. As a result, as in the case of the above-mentioned configuration [2], the cleaning fluid (liquid, vapor, high-pressure compressed air, etc.) is sprayed from the second spraying means 9, 10 of the first cleaning unit 1 onto the object to be cleaned. Then, the oil and the like adhering to the outer surface of the object to be cleaned is removed and floats on the liquid surface of the liquid M1. Then, when it is judged that both the cleaning in the air and the cleaning in the state of being immersed in the liquid M1 should be performed, the lifting means 29 moves the object to be cleaned to the first position and the second position. The lifting operation is performed once or plural times.
As a result, in the first position, as in the case of the configuration described in [1] above, the cleaning fluid (liquid, vapor, high-pressure compressed air, etc.) from the first injection means 8 of the first cleaning unit 1 to the object to be cleaned is provided. ) Is injected, and in the second position, as in the case of the configuration of the above [2], the cleaning fluid (liquid or steam, high-pressure compressed air) is supplied from the second injection means 9 and 10 to the object to be cleaned. Etc.) is jetted. In this case, the oil content of the portion that has entered the inside of the object to be cleaned such as the screw hole and the oil passage for the hydraulic circuit may not be sufficiently removed yet.

When the cleaning in the first cleaning section 1 is completed as described above, the object to be cleaned W is then put in the second cleaning section 2 as in the case of the construction of the above-mentioned [1]. In the second cleaning unit 2, for example, as shown in FIG. 11B, the cleaning target object W is the liquid M2.
The pressure in the space above the liquid M2 in the second cleaning unit 2 is reduced in the state of being immersed in. As a result, the liquid M2 starts to boil to generate minute cavitation bubbles, and the minute cavitation bubbles grow. In this case, when the pressure in the space above the liquid M2 in the second cleaning unit 2 reaches the saturated vapor pressure of the temperature of the liquid M2 at that time,
Cavitation bubbles are generated even better.

The generation and growth of these minute cavitation bubbles are caused by the object to be cleaned such as the outer surface of the object to be cleaned W, the portion entering the inside of the object to be cleaned W such as screw holes and oil passages for hydraulic circuits. It occurs continuously on every surface of W. Therefore, due to the generation and growth of the minute cavitation bubbles and the rise to the liquid surface, the oil and the like adhering to the portion that has entered the inside of the object W to be cleaned is removed. And the first
In the cleaning unit 1, the oil or the like attached to the outer surface of the object to be cleaned W is removed to some extent in advance, and the removed oil or the like does not enter the liquid M2 of the second cleaning unit 2.
In the cleaning unit 2, the cavitation bubbles can reliably remove the oil and the like in the portion that has entered the object to be cleaned W without being disturbed by the oil and the like.

[IV] When constructed as in the above item [4],
As in the case of the configuration of the above [1] or [2] or [3], the "action" described in the above [I] or [II] or [III] is provided, and in addition to this, "Action"
It has. When configured as in the previous section [4], for example, as shown in FIG. 11 (c), when a minute cavitation bubble is generated in the second cleaning unit 2, a high pressure in the liquid M2 of the second cleaning unit 2 is generated. Gas is injected. This allows
The object to be cleaned W is covered with the high pressure gas,
The pressure of the liquid M2 around the object to be cleaned W is slightly recovered.

As described above, when the pressure of the liquid M2 around the object W to be cleaned is restored, the generated minute cavitation bubbles burst and a large impact force is instantaneously generated locally due to this burst. To do. By the impact force due to the rupture of the cavitation bubbles, the oil and the like adhering to the surface of the object to be cleaned W is further separated from the surface of the object to be cleaned W, and the particles are finely crushed by the above-mentioned impact force into the liquid M2. Spread.

The generation of the impact force due to the rupture of one cavitation bubble is local and instantaneous, but as described above, the cavitation bubble is continuously formed on every surface of the object W to be cleaned and every part of the liquid M2. As it will occur,
The above-mentioned impact force is continuously generated on all surfaces of the object to be cleaned W, and oil and the like adhering to all surfaces of the object to be cleaned W are further separated and crushed. Since the impact force due to the rupture of the cavitation bubbles is so strong as to be estimated to be several hundred atmospheric pressure, even if the high-viscosity oil content adheres to the surface of the object W to be cleaned, this high-viscosity oil content is also easily separated and crushed. Be done.

[0021]

According to the first or second aspect of the invention, in addition to the cleaning by jetting the cleaning fluid from the outside in the air or the liquid,
By adding cleaning due to generation and growth of cavitation bubbles, it becomes possible to sufficiently remove oil and the like both on the outer surface of the object to be cleaned and the part that has entered the inside of the object to be cleaned. The cleaning performance of the device could be improved. In the first cleaning unit, the oil and the like adhering to the outer surface of the object to be cleaned is removed to some extent in advance, and the removed oil and the like does not enter the liquid in the second cleaning unit. Since the cleaning can be performed more reliably, the cleaning performance of the machined product cleaning apparatus can be further improved.

According to the third aspect, similar to the case of the first or second aspect, the "effect of the invention" of the first or second aspect is provided. According to the third aspect, depending on the shape and type of the object to be cleaned, cleaning by injecting a cleaning fluid in air, cleaning by injecting a cleaning fluid in liquid, in air and in liquid can be performed. Since it is possible to select the state of cleaning in the first cleaning unit, such as cleaning by spraying a cleaning fluid in both, it is possible to broaden the applicable range of the machined machine cleaning device and further improve the cleaning performance. did it.

According to the fourth aspect, similar to the case of the first, second or third aspect, the "effect of the invention" of the first, second or third aspect is provided. According to the fourth aspect of the present invention, in addition to the generation and growth of cavitation bubbles in the second cleaning unit, the impact force due to the rupture of the cavitation bubbles is generated, so that the oil content in the portion that has entered the object to be cleaned is further improved. By removing the oil, even the high-viscosity oil can be sufficiently removed, and the cleaning performance of the machined product cleaning apparatus can be further improved.

[0024]

Embodiments of the present invention will be described below with reference to the drawings. (1) First, the entire cleaning device will be described. As shown in FIG. 1, the supply unit 3 into which the cleaning object W is fed,
The entire cleaning apparatus is configured to include a first cleaning unit 1 for cleaning the cleaning target W and a second cleaning unit 2 for further cleaning the cleaning target W cleaned by the first cleaning unit 1. .

The object W to be cleaned is mounted on a support frame (not shown) formed in a plurality of upper and lower shelves, and a transmission shaft (not shown) and a transmission gear (not shown) which have been machined or hardened.
A large number of (corresponding to the machined products described above) are placed. The feeding unit 3 is provided with a transporting device 4 that is freely bent and sent out and pulled back. The transporting device 4 transports the uncleaned object W from the feeding unit 3 to the first cleaning unit 1. The object W to be cleaned of the first cleaning unit 1 is conveyed to the second cleaning unit 2, and the object W to be cleaned after cleaning is conveyed from the second cleaning unit 2 to the supply unit 3 again.

(2) Next, the structure of the first cleaning unit 1 will be described. As shown in FIGS. 1 and 3, the first cleaning unit 1 has a vertically long room shape, and the lower half of the first cleaning unit 1 has a cleaning liquid M1 (tap water mixed with a small amount of cleaning agent). The first door 6 and the second door which are slid up and down by the air cylinder 5 to be opened and closed on the side of the supply unit 3 and the side of the second cleaning unit 2 above the liquid M1. 7 is provided.

As shown in FIGS. 1, 3 and 5, in the upper half of the first cleaning section 1, a first injection nozzle 8a having a plurality of injection nozzles 8a is provided.
The cleaning pipe 8 (corresponding to the injection means and the first injection means)
Many are arranged on the ceiling and the left and right side walls. On the other hand, as shown in FIG. 4, in the lower half of the first cleaning unit 1,
A pair of second cleaning pipes 9 (corresponding to the jetting means and the second jetting means) having a large number of jetting ports 9a and bent in a serpentine shape are arranged at the bottom, as shown in FIGS. Three third cleaning pipes 10 (corresponding to a jetting means and a second jetting means) having a large number of jetting ports 10a are arranged on the front and rear surfaces, three on each of the right and left side surfaces, and one pair is arranged on the bottom. . First gas burner 1 for heating liquid M1 to raise its temperature
1 and heating pipe 12 are arranged at the bottom.

As shown in FIG. 2, the pump 13 and the first cleaning pipe 8 which suck the liquid M1 in the lower half of the first cleaning unit 1 and supply it to the first cleaning pipe 8 in the upper half through the supply system 15.
The supply system 15 is provided with a steam supply device 14 for supplying steam via the supply system 16. A pump 18 for sucking the lower half liquid M1 of the first cleaning unit 1 to supply it to the third cleaning pipe 10 via a supply system 17, and supplying high-pressure compressed air to the third cleaning pipe 10 via a supply system 19. A compressor 20 feeding the system 17 is provided. A blower 23 that supplies atmospheric pressure air to the supply system 15 of the second cleaning pipe 9 and the first cleaning pipe 8 via the supply systems 21 and 22.
(Corresponding to injection means) is provided.

A recovery tank 24 for recovering the liquid M1 overflowing from the lower half of the first cleaning unit 1 is provided, and the oil floating on the liquid surface of the recovery tank 24 is recovered and put in a waste oil can 25. A device 26 is provided. A pump 28 for sucking the liquid M1 from the bottom of the lower half of the first cleaning unit 1 and the bottom of the recovery tank 24 and returning the liquid M1 to the lower half of the first cleaning unit 1 through a filter 27 and an oil / water separator (not shown) is provided. ing.

With the above structure, in the upper half of the first cleaning section 1, the first cleaning pipe 8 is connected to the first nozzle 8a through the first nozzle 8a.
The liquid M1 (corresponding to the cleaning fluid) in the lower half of the cleaning unit 1 is sprayed in a shower shape (pump 13 and supply system 15), or steam (corresponding to the cleaning fluid) is sprayed (steam supply device 1).
4 and supply systems 15 and 16), and it is possible to inject air at atmospheric pressure (corresponding to the cleaning fluid) (blower 23).
And supply system 15, 22). Liquid M in the lower half of the first cleaning unit 1
In 1, the air of atmospheric pressure (corresponding to the cleaning fluid) is jetted from the second cleaning pipe 9 (the blower 23 and the supply system 21), and the liquid M1 (corresponding to the cleaning fluid) is supplied from the third cleaning pipe 10. Injection (pump 18 and supply system 17),
A micro jet jet (corresponding to a washing fluid) in which the liquid M1 and high-pressure compressed air are mixed can be jetted from the third washing pipe 10 (pump 18, compressor 20, and supply systems 17, 19).

An elevating device 29 (corresponding to elevating means) for the article W to be cleaned is provided in the first cleaning section 1. Figure 6 (a)
As shown in (b) and FIG. 3, a bottom frame 31 in which the frame is assembled in a frame shape is swingably supported around a horizontal axis P1 of a main frame 30 in which the frame is assembled in a gate shape. Four air cylinders 32 for swinging the bottom frame 31 around the horizontal axis P1 with respect to the frame 30 are provided.

As shown in FIGS. 1, 3 and 5, four vertically oriented guide rails 34 are arranged in the first cleaning section 1, and the main frame 30 is provided with eight rollers 35.
5 and the guide rail 34 guide the lifting device 29 up and down, and a pair of air cylinders 33 for lifting the lifting device 29 are connected to the main frame 30. As a result, the lifting device 29 is moved to the air cylinder 33.
By the first position above the liquid M1 (see FIG. 3),
Also, the elevating operation is performed over the second position (see FIG. 1) where the liquid M1 is immersed.

The guide portion 36 into which the conveying device 4 shown in FIG. 1 is inserted and the roller 37 for supporting the article W to be cleaned are shown in FIG.
As shown in (a), (b), and FIG. 3, the bottom frame 31 of the lifting device 29 is provided with a support frame 38 that supports the cleaning target W from both left and right sides so as not to fall down. ing. The guide portion 36 into which the transport device 4 enters and the roller 37 that supports the article to be cleaned W are also provided on the upper portion of the main frame 30.

(3) Next, the structure of the second cleaning section 2 will be described. As shown in FIGS. 1, 2, and 7, the second cleaning unit 2 is composed of an upper cleaning chamber 39 and a lower liquid tank 40. The cleaning chamber 39 has a cylindrical pressure-resistant structure, is equipped with a lid portion 41 on the first cleaning portion 1 side, and is configured such that the lid portion 41 can be moved up and down by an air cylinder 62 and a pair of wires 63. are doing.

In the upper cleaning chamber 39, a large number of fourth cleaning pipes 42 having a plurality of injection nozzles 42a are arranged on the ceiling and the left and right sidewalls, and a double cleaning pipe is provided around the cleaning chamber 39. The heat retaining wall 43 is formed, and an injection pipe 57 having a large number of injection ports (not shown) at the bottom of the cleaning chamber 39.
A guide part 44 (corresponding to an injection unit) into which the transport device 4 shown in FIG. 1 is inserted and a roller 45 for supporting the article W to be cleaned are provided.

As shown in FIG. 2, a cleaning liquid M2 (tap water mixed with a slight cleaning agent) is provided in the lower liquid tank 40.
Is filled, and the second gas burner 46 and the heating pipe 47 that heat the liquid M2 to raise the temperature are arranged at the bottom. A recovery tank 48 for recovering the liquid M2 overflowing from the liquid tank 40 is provided, and a recovery device 50 for recovering the oil floating on the liquid surface of the recovery tank 48 and putting it in a waste oil can 49 is provided. Bottom of liquid tank 40 and recovery tank 48
A pump 52 for sucking the liquid M2 from the bottom of the tank and returning it to the liquid tank 40 through the filter 51 is provided.

The fourth cleaning pipe 42 of the cleaning chamber 39 is provided with a supply system 53 for supplying the steam from the steam supply device 14, and the atmospheric pressure air from the blower 23 is supplied to the supply system 56.
Is configured to be supplied to the supply system 53 via the supply system 53, and the liquid M2 in the liquid tank 40 is sucked and supplied via the supply system 54.
3 is provided with a pump 55. Wash water M3
Is provided with a water tank 64 that stores the water, and a pump 66 that supplies the cleaning water M3 in the water tank 64 to the supply system 54 via the supply system 65.

A supply system 58 for sucking the liquid M2 in the liquid tank 40
A pump 59 for supplying to the double heat-insulating wall 43 of the cleaning chamber 39 is provided via the above, and the atmospheric pressure air from the blower 23 is supplied to the injection pipe 57 at the bottom of the cleaning chamber 39 via the supply system 60. It is configured to be. A vacuum pump 61 (corresponding to a pressure reducing unit) that sucks air from the upper portion of the cleaning chamber 39 to reduce the pressure inside the cleaning chamber 39 is provided.

With the above construction, in the cleaning chamber 39, from the injection nozzle 42a of the fourth cleaning pipe 42 to the liquid tank 4
0 liquid M2 in the form of a shower (pump 55 and supply systems 53, 54), injection of steam from the injection nozzle 42a of the fourth cleaning pipe 42 (steam supply device 14 and supply system 53), injection Air at atmospheric pressure can be jetted from the pipe 57 (the blower 23 and the supply system 6).
0).

(4) In this cleaning apparatus, the object W to be cleaned is first cleaned in the first cleaning section 1 and then in the second cleaning section 2. Next, the flow of cleaning in the first cleaning unit 1 will be described. As shown in FIG. 3, in the state where the lifting device 29 of the first cleaning unit 1 is raised to the first position above the liquid M1,
The first door 6 of the cleaning unit 1 is operated to open upward, and the object W to be cleaned of the supply unit 3 is sent to the upper half of the first cleaning unit 1 by the transport device 4 and is then transferred to the bottom frame 31 of the lifting device 29. Placed. Next, the transport device 4 returns to the supply unit 3, and the first door 6 is closed downward and operated.

(4) -1 In the lifting device 29, as shown in FIG.
3,4,5 Operation pattern A1, A2, A3, A4, A5
5 types are set. In the first operation pattern A1, the elevating device 29 (object W to be cleaned) with the bottom frame 31 (object W to be cleaned) of the elevating device 29 fixed in a horizontal posture.
The first position above the liquid M1 and the second position immersed in the liquid M1
Elevating operation is automatically repeated for a predetermined time after reaching the position. In the second operation pattern A2, the posture of the bottom frame 31 (the object to be cleaned W) of the lifting device 29 is fixed to the desired right or left inclined posture by the air cylinder 32 (see FIG. 6B). The elevating device 29 (the object to be cleaned W) is automatically repeatedly moved up and down over a first position above the liquid M1 and a second position where it is immersed in the liquid M1 after a predetermined time.

In the third operation pattern A3, the lifting device 29
With the (object W to be cleaned) fixed at the first position above the liquid M1, the bottom frame 31 (object to be cleaned W) of the lifting device 29 is moved to the right tilted position and the left tilted position by the air cylinder 32. The rocking operation is automatically repeated repeatedly for a predetermined time. In the fourth operation pattern A4, the bottom frame 31 (object W to be cleaned) of the elevating device 29 is moved by the air cylinder 32 in a state where the elevating device 29 (object W to be cleaned) is fixed at the second position immersed in the liquid M1. The rocking operation is automatically repeated repeatedly for a predetermined time period between the right tilted posture and the left tilted posture.

In the fifth operation pattern A5, the lifting device 29
The (object W to be cleaned) is located at a first position above the liquid M1 and the liquid M1.
The bottom frame 3 of the elevating device 29 is moved up and down automatically for a predetermined period of time over the second position where the elevating device 29 is in the first and second positions.
1 (the object to be cleaned W) is automatically and repeatedly oscillated by the air cylinder 32 over a right tilted posture and a left tilted posture after a predetermined time.

(4) -2 In the upper half of the first cleaning unit 1,
2, 3, 4, 5, 6, 7 Injection pattern B1, B2, B
Seven types of B3, B4, B5, B6 and B7 are set. As shown in FIG. 9, in the first injection pattern B1, only the liquid M1 from the pump 13 is continuously injected from the first cleaning pipe 8. In the second injection pattern B2, only the steam from the steam supply device 14 is continuously injected from the first cleaning pipe 8. In the third injection pattern B3, the blower 23
Only the air of atmospheric pressure from is continuously jetted from the first cleaning pipe 8.

In the fourth injection pattern B4, the liquid M1 from the pump 13 and the vapor from the vapor supply device 14 are automatically and repeatedly ejected from the first cleaning pipe 8 alternately at a predetermined time. In the fifth injection pattern B5, the steam from the steam supply device 14 and the atmospheric pressure air from the blower 23 are automatically and repeatedly injected alternately from the first cleaning pipe 8 at a predetermined time.

In the sixth injection pattern B6, the liquid M1 from the pump 13 and the atmospheric pressure air from the blower 23 are automatically and repeatedly ejected from the first cleaning pipe 8 alternately at a predetermined time. In the seventh injection pattern B7, the liquid M1 from the pump 13, the vapor from the vapor supply device 14, and the atmospheric pressure air from the blower 23 are the first cleaning pipe 8
Then, a predetermined period of time is alternately set and the fuel is automatically and repeatedly ejected.

(4) -3 In the lower half of the first cleaning unit 1, the following first and
2,3,4,5,6,7 injection pattern C1, C2, C
Seven types of C3, C4, C5, C6 and C7 are set. As shown in FIG. 10, in the first injection pattern C1, only the atmospheric pressure air from the blower 23 is supplied to the second cleaning pipe 9
Is continuously ejected from. In the second injection pattern C2, only the liquid M1 from the pump 18 is continuously injected from the third cleaning pipe 10. In the third injection pattern C3, only the microjet jet stream in which the liquid M1 from the pump 18 and the high-pressure compressed air from the compressor 20 are mixed is continuously ejected from the third cleaning pipe 10.

In the fourth injection pattern C4, the blower 23
Of the atmospheric pressure from the second cleaning pipe 9 and the liquid M1 from the pump 18 is discharged from the third cleaning pipe 1.
The state of being injected from 0 is automatically repeated alternately with a predetermined time. In the fifth injection pattern C5, the liquid M1 from the pump 18 and the micro jet jet (pump 1
8 and the compressor 20) are automatically and repeatedly injected alternately from the third cleaning pipe 10 at a predetermined time.

The sixth jet pattern C6 is a state in which atmospheric pressure air from the blower 23 is jetted from the second washing pipe 9, and a micro jet jet (pump 18 and compressor 20) is jetted from the third washing pipe 10. The state is automatically repeated with a predetermined time alternately.
In the seventh jet pattern C7, the atmospheric pressure air from the blower 23 is jetted from the second washing pipe 9, the liquid M1 from the pump 18 is jetted from the third washing pipe 10, and the micro jet jet ( The state in which the pump 18 and the compressor 20) are injected from the third cleaning pipe 10 is automatically repeated alternately with a predetermined time interval.

(4) -4 As described in (4) -1, 2, 3 above, the first to fifth operation patterns A1 to A5 are set in the lifting device 29 in the first cleaning unit 1. In the upper half of the first cleaning unit 1,
The seventh injection patterns B1 to B7 are set, and the first to seventh injection patterns C1 to C7 are set in the lower half portion of the first cleaning unit 1.

As a result, one of the first to fifth operation patterns A1 to A5 for the lifting device 29 is selected so as to be suitable for cleaning the object W to be cleaned depending on the shape and type of the object W to be cleaned. 1 one of the first to seventh injection patterns B1 to B7 for the upper half of the cleaning unit 1 and the first cleaning unit 1
One is selected from the first to seventh injection patterns C1 to C7 for the lower half part. In this case, if the third operation pattern A3 is selected as shown in FIG.
It is not necessary to select the seventh injection patterns C1 to C7. When the fourth operation pattern A4 is selected, it is not necessary to select the first to seventh injection patterns B1 to B7 in the upper half part. Therefore, there are a total of 161 combinations of selection.

For example, if the first operation pattern A1, the fourth injection pattern B4, and the fifth injection pattern C5 are selected, the bottom frame 31 (e.g., to be cleaned) of the lifting device 29 is moved by the first operation pattern A1 as shown in FIG. With the object W) fixed in a horizontal position, the lifting device 29 (the object W to be cleaned) moves to the liquid M.
The first position above 1 and the second position where the liquid M1 is immersed are automatically repeatedly moved up and down with a predetermined time. While the lifting device 29 (the object to be cleaned W) is stopped at the first position, the liquid M1 from the pump 13 and the steam from the steam supply device 14 are caused by the fourth injection pattern B4.
The first cleaning pipe 8 automatically and repeatedly sprays the object W to be cleaned with a predetermined time alternately. And
While the lifting device 29 (the object to be cleaned W) is stopped at the second position, the liquid M1 from the pump 18 and the micro jet jets (the pump 18 and the compressor 20) are subjected to the third cleaning by the fifth injection pattern C5. The object to be cleaned W is automatically and repeatedly jetted from the pipe 10 with a predetermined time interval.

In this case, the temperature of the liquid M1 to be sprayed on the object W to be cleaned in the upper half of the first cleaning section 1 and the temperature of the liquid M1 for immersing the object W to be cleaned in the lower half of the first cleaning section 1 are , The first gas burner 11 shown in FIG. 2 according to the shape and type of the object W to be cleaned.
Can be set to an optimum temperature.

As shown in FIG. 8 for the lifting device 29,
When the first, second, fourth, fifth operation patterns A1, A2, A4, A5 other than the third operation pattern A3 are selected, the lifting device 29 (object W to be cleaned) is stopped at the second position where it is immersed in the liquid M1. Then, while the first to seventh injection patterns C1 to C7 for the lower half of the first cleaning unit 1 are being performed, the first injection pattern B1 is performed in the upper half of the first cleaning unit 1. There is. As described above, while the object W to be cleaned is being washed while being immersed in the liquid M1, the shower-shaped liquid M1 is applied to the liquid surface, whereby foaming on the liquid surface can be suppressed. As a result, the oil removed from the object to be cleaned W does not disperse when it floats on the liquid surface, and it is easy to collect the oil, and when the oil is collected on the liquid surface, this oil is shown in FIG. It is easy to flow to the recovery tank 24 side shown.

(5) When the cleaning of the object W to be cleaned in the first cleaning unit 1 is completed as described above, the lifting device 29 is lifted to the first position and stopped as shown in FIG. The first and second doors 6 and 7 of the first cleaning unit 1 shown in FIG. 1 and the lid 41 of the cleaning chamber 39 of the second cleaning unit 2 are opened upward. Next, the carrier device 4 waiting on the supply unit 3 is transferred to the first cleaning unit 1.
The object to be cleaned W that has entered the cleaning chamber 39 from the upper half of the first cleaning unit 1 and is supported by the lifting device 29 of the first cleaning unit 1 is
Is fed into the cleaning chamber 39 of the second cleaning unit 2, the transport device 4 returns to the supply unit 3, and the lid 41 of the cleaning chamber 39 is closed downward.

(5) -1 When the object W to be cleaned is installed in the cleaning chamber 39, FIG.
Also, as shown in FIG.
Of the liquid M2 is sucked and supplied to the fourth cleaning pipe 42 of the cleaning chamber 39, and the liquid M2 is applied to the object W to be cleaned from the jet nozzle 42a.
Is jetted.

In this case, the liquid M2 in the liquid tank 40 is previously heated by the second gas burner 46 (for example, 9
This high temperature liquid M2 is sprayed onto the object W to be cleaned in the cleaning chamber 39, and the high temperature liquid M2 is stored in the cleaning chamber 39. In this way, by storing the liquid M2 in the cleaning chamber 39 while injecting the high-temperature liquid M2 onto the object to be cleaned W, the oil content adhering to the object to be cleaned W can be dropped to some extent.

(5) -2 As shown in FIG. 11B, when the high temperature liquid M2 is stored in the cleaning chamber 39 until the object W to be cleaned is completely immersed, the pump 55 stops and the vacuum pump 61 Starts to work. As a result, the air in the space above the liquid M2 in the cleaning chamber 39 is discharged, and the space is depressurized to a predetermined low pressure or lower (for example, about 33.3 to 40 kilopascals).

When the space above the liquid M2 in the cleaning chamber 39 is decompressed in this way, the high temperature liquid M2 in the cleaning chamber 39 begins to boil to generate minute cavitation bubbles, and these minute cavitation bubbles grow. . In this case, when the pressure in the space above the liquid M2 in the cleaning chamber 39 reaches the saturated vapor pressure at the temperature of the liquid M2 at that time, cavitation bubbles are further generated. The generation and growth of such minute cavitation bubbles are caused by the outer surface of the object W to be cleaned,
It occurs on every surface of the article to be cleaned W and every part of the liquid M2, such as a portion that has entered the inside of the article to be cleaned W such as a screw hole or an oil passage for a hydraulic circuit. Therefore, due to the generation, growth, and rise of the minute cavitation bubbles described above, the oil adhering to the portion that has entered the inside of the object to be cleaned W is removed.

(5) -3 Next, as shown in FIG. 11C, the air at atmospheric pressure from the blower 23 is supplied to the injection pipe 57 arranged in the lower portion of the cleaning chamber 39. In this way, when the atmospheric pressure air is supplied to the lower side of the object to be cleaned W, the atmospheric pressure air becomes bubbles of the atmospheric pressure and moves from the lower side to the upper side of the liquid M2 in the cleaning chamber 39. The space above the cleaning chamber 39 is reached. As a result, the object W to be cleaned is covered with the bubbles of atmospheric pressure, and the pressure of the liquid M2 around the object W to be cleaned is slightly recovered.

As described above, when the pressure of the liquid M2 around the object W to be cleaned is restored, the generated minute cavitation bubbles burst, and a large impact force is instantaneously generated locally due to this burst. . As a result, the oil force adhering to the surface of the object to be cleaned W is further separated from the surface of the object to be cleaned W by the impact force due to the rupture of the cavitation bubbles, and the liquid M is finely crushed by the aforementioned impact force.
The oil is dispersed in 2 and is carried to the upper liquid surface by its buoyancy and the bubbles of atmospheric pressure moving upward.

The generation of the impact force due to the rupture of one cavitation bubble is local and instantaneous, but as described above, the cavitation bubble is continuously formed on every surface of the object W to be cleaned and every part of the liquid M2. As it will occur,
The above-described impact force is continuously generated on all surfaces of the object to be cleaned W, and the oil component adhering to all surfaces of the object to be cleaned W is further separated and crushed. Since the impact force due to the rupture of the cavitation bubbles is so strong as to be estimated to be several hundred atmospheric pressure, even if the high-viscosity oil content adheres to the surface of the object W to be cleaned, this high-viscosity oil content is also easily separated and crushed. Be done.

As shown in FIG. 11C, while the atmospheric pressure air is being supplied to the injection pipe 57 in the lower portion of the cleaning chamber 39, the pressure in the space above the cleaning chamber 39 is initially set by the vacuum pump 61. Pressure slightly higher than the specified low pressure of
Approximately 112.5 kPa). As described above, while the air at the atmospheric pressure is being supplied, as shown in FIG.
By maintaining a pressure slightly higher than the first predetermined low pressure shown in (b), generation and growth of cavitation bubbles,
The most vigorous generation of impact force is due to the bursting of cavitation bubbles.

(5) -4 When the cleaning by the rupture of the cavitation bubbles is completed as described above, the liquid M2 is drained from the bottom of the cleaning chamber 39 and stored in the lower liquid tank 40 as shown in FIG. Will be returned. After that, when all the liquid M2 is drained from the cleaning chamber 39, the steam from the steam supply device 14 is subjected to the fourth cleaning with the pressure inside the cleaning chamber 39 maintained at a pressure lower than the atmospheric pressure by the vacuum pump 61. The object W to be cleaned is sprayed through the pipe 42. As a result, when the liquid surface descends along the object W to be cleaned as the liquid M2 is drained from the cleaning chamber 39, even if the oil component floating on the liquid surface reattaches to the object W to be cleaned. By injecting steam as described above, the reattached oil component is removed. By injecting the steam in a state where the pressure inside the cleaning chamber 39 is reduced, the reattached oil component is well removed.

Next, as shown in FIG. 12B, with the vacuum pump 61 maintaining the pressure in the cleaning chamber 39 at a pressure lower than the atmospheric pressure, the cleaning water M3 in the water tank 64 is supplied from the pump 66 to the first position. The cleaning object W is sprayed through the cleaning pipe 42. As a result, the cleaning of the object W to be cleaned and the cooling are performed, and the sprayed cleaning water M3 is not stored in the cleaning chamber 39 but is drained and collected in the liquid tank 40,
It is replenished as a cleaning liquid M2.

(5) -5 When finishing the washing with the washing water M3 and cooling,
As shown in FIG. 12C, the cleaning chamber 39 is decompressed by the vacuum pump 61 from the state shown in FIG. 12A to a state close to a vacuum, whereby the cleaning target W is dried. Is done. As described above, the first cleaning unit 1
Then, the cleaning of the object W to be cleaned in the second cleaning unit 2 is completed, and when the cleaning is completed, the first cleaning unit 1 of the first cleaning unit 1 shown in FIG.
Further, the second doors 6, 7 and the lid 41 of the second cleaning unit 2 (cleaning chamber 39) are operated to open upward, and the carrier device 4 waiting on the supply unit 3 is moved to the first cleaning unit 1 (the lifting device 29). ) And enters the cleaning chamber 39 of the second cleaning unit 2. Then, the object W to be cleaned, which has been cleaned, is moved from the cleaning chamber 39
It is returned to the supply unit 3 through the cleaning unit 1 (elevating device 29).

[First Embodiment] The process shown in FIG. 12A may be performed as shown in FIG. When the cleaning by bursting the cavitation bubbles shown in FIG.
As shown in FIG. 13, with the vacuum pump 61 maintaining the pressure inside the cleaning chamber 39 at a pressure lower than atmospheric pressure, the cleaning chamber 3
While the liquid M2 is drained from the bottom of 9 and returned to the lower liquid tank 40, at the same time, the steam from the steam supply device 14
The object W to be cleaned is sprayed through the cleaning pipe 42.

When the liquid surface descends along the object W to be cleaned as the liquid M2 is drained from the cleaning chamber 39, (5)
As described in -4, the oil component floating on the liquid surface may redeposit on the object W to be cleaned. In this case, in the step shown in FIG. 12 (a), the steam is not jetted until all the liquid M2 is drained from the cleaning chamber 39, and therefore, after the liquid M2 is drained from the cleaning chamber 39, the oil W is removed from the object W to be cleaned. It is conceivable that the oil will be removed by injecting steam in the state where the oil is reattached, and that the oil reattached cannot be sufficiently removed.

On the other hand, in the process shown in FIG. 13, the vapor is injected at the same time as the liquid M2 is drained from the cleaning chamber 39.
Therefore, when the liquid surface descends along the object W to be cleaned,
Even if the oil floating on the liquid surface reattaches to the object W to be cleaned,
Since steam is sprayed around the object to be cleaned W, reattachment of oil to the object to be cleaned W is prevented in advance. Then, even if the oil content reattaches to the object to be cleaned W, the oil content is removed by the steam that is injected before the oil re-adheres sufficiently, and when the steam is injected, the inside of the cleaning chamber 39 is changed as described above. By reducing the pressure, the redeposition of oil by the injection of steam is better prevented. As in the step shown in FIG. 12A, if all the liquid M2 is drained from the cleaning chamber 39 and then steam is injected, the time required for the step shown in FIG. In the step shown in FIG. 13, since the liquid M2 is drained from the cleaning chamber 39 and the steam is injected at the same time, the time required for the step shown in FIG. 13 can be shortened.

[Second Embodiment] The process shown in FIG. 11C may be performed as shown in FIGS. 14A, 14B and 14C. As shown in FIG. 11C, when atmospheric pressure air is supplied from the injection pipe 57 into the cleaning chamber 39 to recover the pressure of the liquid M2 around the object to be cleaned W, particularly in the lower part of the liquid M2. In some cases, the low pressure state in which cavitation bubbles are generated cannot be maintained, and cavitation bubbles are generated only in the upper layer of the liquid M2.

In such a case, as shown in FIG. 14 (a), while the object W to be cleaned is completely immersed in the liquid M2, air at atmospheric pressure is supplied from the injection pipe 57 into the cleaning chamber 39. , Cavitation bubbles are generated only on the upper part of the liquid M2. When the step shown in FIG. 14 (a) is performed for a predetermined time, then as shown in FIG. 14 (b), the supply of atmospheric pressure air from the vacuum pump 61 and the injection pipe 57 is stopped once,
The liquid M2 is slightly drained from the cleaning chamber 39 to lower the liquid surface,
The depressurization by the vacuum pump 61 and the supply of the atmospheric pressure air from the injection pipe 57 are restarted again, and the cavitation bubbles are generated again only above the liquid M2. When the step shown in FIG. 14B is performed for a predetermined time, the supply of atmospheric pressure air from the vacuum pump 61 and the injection pipe 57 is stopped again as shown in FIG. The liquid M2 is further removed from 39, the liquid level is lowered, the vacuum pump 61 decompresses again and the supply of atmospheric pressure air from the injection pipe 57 is restarted, and cavitation bubbles are generated again only above the liquid M2. .

As described above, by sequentially moving the upper layer of the liquid M2 in which the cavitation bubbles are generated downward, the cleaning by the cavitation bubbles can be performed on the entire object W to be cleaned. In this case, FIG.
After the end of each step shown in (a), (b), and (c) (before the start of the next step), steam is injected as shown in FIG. 12 (a), or as shown in FIG. At the end of each step shown in (a), (b), and (c), by injecting steam while draining the liquid M2, the steps shown in (a) and (b) of FIG. The steps shown in (c) can be efficiently performed in parallel, and the overall time can be shortened.

The order shown in FIGS. 14 (a), (b), and (b) may be replaced with the order shown in FIGS. 14 (a), (b), and (c). In this case, if the liquid M2 is jetted to store the liquid M2 as shown in FIG. 11A at the start of each process shown in FIGS. 11
The step shown in (a) and the steps shown in (c), (b), and (i) of FIG. 14 can be efficiently performed in parallel, and the overall time can be shortened.

[Third Embodiment] FIGS. 14 (a) and 14 (b).
In the step shown in (c), the liquid M is discharged from the bottom of the cleaning chamber 39.
A pump (not shown) that sucks 2 and returns it to the liquid tank 40 may be provided. With this configuration, when the process shown in FIG. 14A is transferred to the process shown in FIG. 14B, and when the process shown in FIG. 14B is transferred to the process shown in FIG. 14C. Moreover, it is not necessary to stop the supply of the atmospheric pressure air from the vacuum pump 61 and the injection pipe 57, and the liquid level of the liquid M2 can be lowered while the cavitation bubbles are generated. Accordingly, the liquid M2 can be gradually withdrawn continuously while the cavitation bubbles are being generated from the step shown in FIG.

If the liquid surface of the liquid M2 can be lowered while the cavitation bubbles are generated as described above, the liquid surface will be changed as the liquid M2 is drained as described in (5) -4 above. It is expected that the state in which the floating oil content reattaches to the object W to be cleaned does not occur due to the generation of cavitation bubbles. As a result, if the liquid surface of the liquid M2 can be lowered while the cavitation bubbles are generated, the step of injecting steam onto the object to be cleaned W as shown in FIGS. 12A and 13 can be omitted. But
The overall time can be shortened.

[Fourth Embodiment] In the configuration shown in FIG.
In the cleaning part 2, the second gas burner 46 and the heating pipe 47 for heating the liquid M2 are provided in the liquid tank 40, but the second gas burner 46 and the heating pipe 47 may be provided in the cleaning chamber 39. In the configuration shown in FIG. 1, the object W to be cleaned is put into the empty cleaning chamber 39, and then the liquid M2 is jetted into the cleaning chamber 39. 39 is filled with the liquid M2 and is set to a state of boiling.
You may comprise so that a lid may be closed and a lid is closed.

It should be noted that reference numerals are added to the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is an overall side view of a cleaning device.

FIG. 2 is a circuit diagram showing a connection state of each part of the cleaning device.

FIG. 3 is a vertical sectional front view of a first cleaning unit.

FIG. 4 is a plan view of the lower half of the first cleaning unit.

FIG. 5 is a cross-sectional plan view of the upper half of the first cleaning unit.

FIG. 6 is a perspective view showing an elevating device arranged in the first cleaning unit.

FIG. 7 is a front view of a second cleaning unit.

FIG. 8 is a diagram showing first to fifth operation patterns of the lifting device in the first cleaning unit.

FIG. 9 is a diagram showing first to seventh injection patterns of the upper half portion in the first cleaning unit.

FIG. 10 is a view showing first to seventh injection patterns of a lower half portion in the first cleaning section.

FIG. 11 is a diagram showing a first half flow of cleaning an object to be cleaned in the second cleaning section.

FIG. 12 is a diagram showing the latter half of the flow of cleaning the object to be cleaned in the second cleaning section.

FIG. 13 is a diagram showing a state in which the liquid is being drained after cleaning the object to be cleaned in the second cleaning unit in the first alternative embodiment.

FIG. 14 is a diagram showing a flow of cleaning an object to be cleaned by cavitation bubbles in the second cleaning section in the second alternative embodiment.

[Explanation of symbols]

 1 1st washing | cleaning part 2 2nd washing | cleaning part 8 1st washing | cleaning part injection means, 1st jetting means 9,10 1st washing | cleaning part jetting means, 2nd jetting means 23,57 2nd washing | cleaning part injection means 29th 1 Elevating means for cleaning section 61 Depressurizing means for second cleaning section W Object to be cleaned M1 Solution for first cleaning section M2 Solution for second cleaning section

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hirotaka Tsubota 1-47 Shikitsu East, Naniwa-ku, Osaka City, Osaka Prefecture Kubota Co., Ltd. 2-47, Kubota Co., Ltd.

Claims (4)

[Claims] 1. A first cleaning part (1) for cleaning an object to be cleaned (W), and a second cleaning part (1) for further cleaning the object to be cleaned (W) cleaned by the first cleaning part (1). 2), the first cleaning unit (1) is provided with an injection unit (8) for injecting a cleaning fluid onto the object to be cleaned (W), and a predetermined amount for immersing the object to be cleaned (W). Liquid (M2)
And a pressure reducing means (61) for reducing the pressure in the space above the liquid (M2) to a predetermined low pressure or less to boil the liquid (M2) in the second cleaning section (2). A machined work cleaning device. 2. A first cleaning unit (1) for cleaning an object to be cleaned (W), and a second cleaning unit (1) for further cleaning the object to be cleaned (W) cleaned by the first cleaning unit (1). 2) and a predetermined amount of liquid (M1) for immersing the object to be cleaned (W).
And a spraying means (9), (10) for spraying a cleaning fluid to the object to be cleaned (W) in the liquid (M1) in the first cleaning section (1). W) Immersing a predetermined amount of liquid (M2)
And a pressure reducing means (61) for reducing the pressure in the space above the liquid (M2) to a predetermined low pressure or less to boil the liquid (M2) in the second cleaning section (2). A machined work cleaning device. 3. A first cleaning unit (1) for cleaning an object to be cleaned (W), and a second cleaning unit (1) for further cleaning the object to be cleaned (W) cleaned by the first cleaning unit (1). 2) and a predetermined amount of liquid (M1) capable of immersing the object to be cleaned (W).
And in the first cleaning unit (1), the object to be cleaned (W) can be moved up and down over a first position above the liquid (M1) and a second position where it is immersed in the liquid (M1). Lifting means (29) and first spraying means (8) for spraying a cleaning fluid onto the object to be cleaned (W) in the first position.
And the second cleaning means (9), (10) for injecting a cleaning fluid onto the object to be cleaned (W) in the second position, in the first cleaning section (1). Predetermined amount of liquid (M2) for immersing object (W)
And a pressure reducing means (61) for reducing the pressure in the space above the liquid (M2) to a predetermined low pressure or less to boil the liquid (M2) in the second cleaning section (2). A machined work cleaning device. 4. The injection means (23), (57) for injecting a gas having a pressure higher than the predetermined low pressure into the liquid (M2) of the second cleaning section (2). The cleaning device for machined work according to any one of 1.